JP2021081994A - Data collection system, main device of data collection system, control method of data collection system, control program of data collection system - Google Patents

Abstract

To be able to synchronously acquire measurement result at a plurality of terminal devices by simpler configuration than before.SOLUTION: In a data collection system comprising terminal devices 2A, 2B, and 2C acquiring measurement result by sensors 11, 12, and 13, and a main device 5 collecting the measurement result acquired at the terminal devices 2A, 2B, and 2C by communicating data with the terminal devices 2A, 2B, and 2C via wireless communication, the terminal devices 2A, 2B, and 2C start acquiring the measurement result according to a measurement cycle and send it to the main device 5 in response to an instruction from the main device 5 to start the measurement by notification of the measurement cycle. The main device 5 notifies other terminal devices of the measurement cycle and instructs them to start the measurement at the timing of acquiring the measurement result at a reference terminal device for synchronization setting, after instructing the reference terminal devices for synchronization setting in the plurality of terminal devices 2A, 2B, and 2C to start the measurement according to the measurement cycle.SELECTED DRAWING: Figure 1

Description

The present invention relates to a data collection system, a main unit of the data collection system, a control method of the data collection system, and a control program of the data collection system.

Conventionally, a data collection system has been provided in which terminal devices are installed in each part to be monitored such as a plant and data of various measurement results acquired by these terminal devices are collected.
In such a data collection system, it is desired to acquire measurement results in synchronization with a plurality of terminal devices, and Patent Document 1 proposes a device for acquiring measurement results in synchronization in this way.

JP-A-2018-13460

By the way, in the process of acquiring measurement results synchronously with a plurality of terminal devices in this way, it is desired that the process can be executed with a simple configuration.

The present invention has been made in consideration of the above points, and an object of the present invention is to enable a plurality of terminal devices to synchronously acquire measurement results with a simpler configuration than the conventional one.

In order to solve the problem, the invention of claim 1 is
In a data collection system including a terminal device that acquires measurement results by a sensor and a main unit that communicates data with the terminal device by wireless communication and collects the measurement results acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
At the timing when the measurement result is acquired by the reference terminal device for synchronization setting, the measurement cycle is notified to the other terminal device and the measurement start is instructed.

According to the configuration of claim 1, at the timing of acquiring the measurement result in the reference terminal device for synchronization setting, the measurement in a plurality of terminal devices is performed simply by notifying another terminal device of the measurement cycle and instructing the start of measurement. The acquisition of the results can be synchronized, and as a result, the measurement results can be acquired in synchronization with a plurality of terminal devices with a simpler configuration than in the conventional case.

The invention of claim 2 has the configuration of claim 1.
The reference terminal device for synchronization setting is the terminal device that is the first of the plurality of terminal devices to be capable of data communication with the main body device.

According to the configuration of claim 2, for example, the terminal device that is first turned on and enables data communication is set as the reference terminal device for synchronization setting, and the power is turned on in sequence to enable data communication. It is possible to synchronize with the terminal device, and it is possible to synchronize with a simpler process.

The invention of claim 3 has the configuration of claim 1 or claim 2.
The main body device
The measurement time of the measurement result in the plurality of terminal devices is monitored, and the measurement time is monitored.
When the measurement result in which a synchronization deviation of a predetermined value or more occurs with respect to the measurement time by the reference terminal device for time monitoring in the plurality of terminal devices is acquired, the measurement result is obtained by the reference terminal device for time monitoring. At the timing of acquiring the above, at least the terminal device related to the measurement result in which the synchronization shift has occurred is notified of the measurement cycle and instructed to start the measurement again.

According to the configuration of claim 3, when a terminal device in which the synchronization deviation becomes significant occurs for some reason, the timing of processing in the terminal device can be corrected to maintain synchronization.

The invention of claim 4 has the configuration of claim 3.
The reference terminal device for time monitoring is the reference terminal device for synchronization setting.

According to the configuration of claim 4, the reference terminal device for synchronization setting can be used as the reference terminal device for time monitoring to maintain synchronization.

The invention of claim 5 is
In the main body device of a data collection system including a terminal device that acquires a measurement result by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement result acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
At the timing when the measurement result is acquired by the reference terminal device for synchronization setting, the measurement cycle is notified to the other terminal device and the measurement start is instructed.

According to the configuration of claim 5, measurement in a plurality of terminal devices is performed only by notifying another terminal device of the measurement cycle and instructing the start of measurement at the timing of acquiring the measurement result in the reference terminal device for synchronization setting. The acquisition of the results can be synchronized, and as a result, the measurement results can be acquired in synchronization with a plurality of terminal devices with a simpler configuration than in the conventional case.

The invention of claim 6 is
In a control method of a data collection system including a terminal device that acquires a measurement result by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement result acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The control method is
In the main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
At the timing when the measurement result is acquired by the reference terminal device for synchronization setting, the measurement cycle is notified to the other terminal device and the measurement start is instructed.

According to the configuration of claim 6, at the timing of acquiring the measurement result in the reference terminal device for synchronization setting, the measurement in a plurality of terminal devices is performed simply by notifying another terminal device of the measurement cycle and instructing the start of measurement. The acquisition of the results can be synchronized, and as a result, the measurement results can be acquired in synchronization with a plurality of terminal devices with a simpler configuration than in the conventional case.

The invention of claim 7 is
In a data collection system including a terminal device that acquires measurement results by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement results acquired by the terminal device, the main body device is provided. In a control program of a data collection system that executes a predetermined processing procedure by execution by an arithmetic processing circuit
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The processing procedure is
In the main body device
A measurement cycle notification step for the reference terminal device that instructs the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle, and
The reference terminal device for synchronization setting includes a measurement cycle notification step for the other terminal device that notifies the other terminal device of the measurement cycle and instructs the start of measurement at the timing of acquiring the measurement result.

According to the configuration of claim 7, at the timing of acquiring the measurement result by the reference terminal device for synchronization setting, only by notifying the other terminal device of the measurement cycle and instructing the start of measurement, in a plurality of terminal devices. The acquisition of measurement results can be synchronized, and as a result, the acquisition of measurement results can be synchronized with a plurality of terminal devices with a simpler configuration than before.

According to the present invention, it is possible to obtain measurement results in synchronization with a plurality of terminal devices by a simpler configuration than in the past.

It is a figure which shows the data collection system which concerns on 1st Embodiment of this invention. It is a time chart which shows the process at the start of operation. It is a time chart which shows the process of correcting a synchronization deviation.

[First Embodiment]
FIG. 1 is a diagram showing a data collection system according to the first embodiment of the present invention. This data collection system 1 is a system for monitoring a monitoring target such as a plant, and various measurement results are acquired by terminal devices 2A, 2B, and 2C installed in each part of the monitoring target, and the measurement results are used as the main device. Collect, record, and display in step 5.

The data collection system 1 includes terminal devices 2A, 2B, 2C installed in each part to be monitored such as a plant, relay devices 3A, 3B, and terminal devices for relaying data communication between the terminal devices 2A, 2B, and 2C. It includes a main body device 5 that communicates data with 2A, 2B, and 2C and collects measurement results by the terminal devices 2A, 2B, and 2C. Further, the main body device 5 is a network construction device (NW construction device) 7, a network that constructs a network by wireless communication with a user terminal device 6, terminal devices 2A, 2B, 2C, relay devices 3A, and 3B that notify the user of the measurement result. It includes a data monitoring device 8 that collects measurement results by the terminal devices 2A, 2B, and 2C acquired via the construction device 7 and executes processing such as recording.
The data collection system according to the present invention can be widely applied not only to such plant monitoring but also to various monitoring systems.
Further, in the example of FIG. 1, although an example in which three terminal devices 2A, 2B and 2C and two relay devices 3A and 3B are provided is shown, the number of terminal devices and the number of relay devices are different. If there is, it can be set in various ways, and the relay device may be omitted.
Further, the user terminal device 6, the network construction device 7, and the data monitoring device 8 may be integrated in whole or in part.

The terminal devices 2A, 2B, and 2C are operated by the built-in battery to acquire and send out the measurement results by the sensors 11, 12, and 13, respectively. Here, in the data collection system 1, a temperature detection sensor, an acceleration sensor, and the like that can be connected to the terminal devices 2A, 2B, and 2C are prepared, and the terminal devices 2A, 2B, and 2C are desired. It is configured so that sensors 11, 12, and 13 can be connected. The terminal devices 2A, 2B, and 2C drive the connected sensors 11, 12, and 13 to acquire the measurement result, and send the measurement result to the main body device 5. The terminal devices 2A, 2B, and 2C are configured to function as relay devices, whereby the data collection system 1 secures a plurality of routes capable of data communication with the main unit 5 and is configured to enable stable data communication. Will be done.

More specifically, the terminal devices 2A, 2B, and 2C start operating when the power is turned on. When the operation is started, a connection is established with the network construction device 7 directly or via other terminal devices 2A, 2B, 2C or relay devices 3A, 3B, and further, data monitoring is performed via the network construction device 7. Establish a connection with device 8. As a result, the terminal devices 2A, 2B, and 2C are connected to the main body device 5 so that data communication is possible.
Further, when the data is connected to the main body device 5 so as to enable data communication in this way, the corresponding process is executed according to the instruction from the main body device 5.

In this process, when the terminal devices 2A, 2B, and 2C are instructed to start measurement by notifying the measurement cycle from the main body device 5, the terminal devices 2A, 2B, and 2C relate to this instruction from this timing with reference to the timing of the instruction to start measurement. Each time the time according to the measurement cycle elapses, the sensors 11, 12, and 13 acquire the measurement results, and send the acquired measurement results to the main device 5. As a result, the terminal devices 2A, 2B, and 2C start acquiring the measurement result according to the measurement cycle and send it to the main body device 5 in response to the instruction from the main body device 5 to start the measurement by the notification of the measurement cycle.

The relay devices 3A and 3B are devices that relay data communication between the terminal devices 2A, 2B, 2C and the main body device 5, and various configurations corresponding to the wireless communication method and the data communication method of the data collection system 1 are widely applied. can do.

The main body device 5 sends various control data to the relay devices 3A, 3B, the terminal devices 2A, 2B, and 2C to control the operations of the relay devices 3A, 3B, the terminal devices 2A, 2B, and 2C, and further, the relay device. The operations of the terminal devices 2A, 2B, and 2C are monitored, and the data transmitted from the terminal devices 2A, 2B, and 2C is processed.

That is, in the main body device 5, the network construction device 7 constructs a network by wirelessly communicating with the terminal devices 2A, 2B, 2C, the relay devices 3A, and 3B, and inputs the data to be used for the data communication to the data monitoring device 8. Output.

The data monitoring device 8 records and holds data from the terminal devices 2A, 2B, and 2C input from the network construction device 7, further processes the data, and provides the data to the user by the user terminal device 6.
The user terminal device 6 displays the measurement results of the terminal devices 2A, 2B, and 2C, and the processing by the data monitoring device 8. Further, the user terminal device 6 displays various setting screens by the user's operation and notifies the data monitoring device 8 of the user's operation, thereby setting the data collection system 1 in various ways. As the user terminal device 6, various information terminal devices connected to the data monitoring device 8 by wire or wireless can be widely applied, and for example, a personal computer, a smartphone, or the like can be applied.

[Synchronous processing]
The main body device 5 sets one of the terminal devices 2A, 2B, and 2C as the reference terminal device for synchronization setting, instructs the reference terminal device for synchronization setting to start measurement according to the measurement cycle, and then performs this synchronization setting. At the timing when the measurement result is acquired by the reference terminal device of, the measurement cycle is notified to other terminal devices and the start of measurement is instructed. As a result, in other terminal devices, acquisition of measurement results is started at a measurement cycle based on the timing of acquiring measurement results in the reference terminal device for synchronization setting, and in the data collection system 1, a plurality of terminal devices The measurement results can be acquired in synchronization with 2A, 2B, and 2C. As a result, in the data collection system 1, the measurement results can be acquired synchronously by a plurality of terminal devices with a simpler configuration than in the conventional case.

In this embodiment, the reference terminal device for the synchronization setting is set to the terminal device that can perform data communication with the main body device 5 first among the plurality of terminal devices 2A, 2B, and 2C. As a result, the terminal device that is first turned on and enables data communication is set as the reference terminal device for synchronization setting, and is sequentially synchronized with the terminal device that is turned on and enables data communication. It is possible to achieve synchronization by a simpler process.

That is, in the network construction device 7, the main body device 5 starts operating when the terminal devices 2A, 2B, and 2C are turned on, and when a connection request from the terminal devices 2A, 2B, and 2C is received, the terminal device 2A, A series of processes related to the connection process is executed between the 2B and 2C, and a connection is established between the terminal devices 2A, 2B and 2C to which the request is sent. Further, the terminal devices 2A, 2B, and 2C that have established this connection are notified to the data monitoring device 8, and the connection between the terminal devices 2A, 2B, and 2C and the data monitoring device 8 is established.

In the network construction device 7, the main body device 5 serves as a reference terminal device for synchronization setting for the terminal device in which the power is first turned on and data communication is possible among the plurality of terminal devices 2A, 2B, and 2C. Set.
When the connection is established for the reference terminal device for the synchronization setting, the data monitoring device 8 sends a preset measurement cycle to instruct the start of measurement.
As a result, the reference terminal device for this synchronization setting acquires and sends the measurement result in the measurement cycle related to this instruction based on the timing when the measurement start is instructed, and the network construction device 7 acquires this measurement and sends it out. From the time information instructed to start and the measurement cycle, the measurement time of the measurement result sequentially sent from the reference terminal device for synchronization setting is predicted, and the timing for acquiring the measurement result by the reference terminal device for synchronization setting is determined. To detect.

For terminal devices other than the reference terminal device for synchronization setting, the network construction device 7 establishes a connection and then acquires measurement results with the reference terminal device for synchronization setting detected by prediction. Notifies the measurement cycle and instructs the start of operation.
As a result, in other terminal devices, the terminal devices that are sequentially turned on and capable of data communication start acquiring measurement results in synchronization with the reference terminal device for synchronization setting, and as a result, conventional With a simpler configuration than the above, measurement results can be acquired in synchronization with multiple terminal devices.

The main body device 5 executes a predetermined processing procedure to execute the above-described processing by executing the control program of the data collection system by the arithmetic processing circuit provided in the network construction device 7. As a result, the processing procedure by executing this control program consists of a measurement cycle notification step for the reference terminal device that instructs the reference terminal device for synchronization setting in a plurality of terminal devices to start measurement according to the measurement cycle, and a reference terminal device for synchronization setting. It is provided with a measurement cycle notification step for the other terminal device that notifies the measurement cycle to the other terminal device and instructs the start of measurement at the timing of acquiring the measurement result.

FIG. 2 is a time chart showing the processing of this synchronization setting, taking as an example the case where the power supplies of the terminal devices 2A and 2B are sequentially turned on.
In the data collection system 1, the power supplies of all the terminal devices 2A, 2B, and 2C are turned off, and these terminal devices 2A, 2B, and 2C are first held in a state where data communication with the main body device 5 is difficult. When the power supply of the terminal device 2A is turned on, a connection is established with the network construction device 7 of the main body device 5 (S1, S2). As a result, in the data collection system 1, the terminal device 2A is set as the reference terminal device for synchronization setting.

By setting the reference terminal device for the synchronization setting, the main body device 5 instructs the terminal device 2A, which is the reference terminal device for the synchronization setting, to start the measurement according to the measurement cycle (t) from the network construction device 7 (S3). , The terminal device 2A acquires the measurement result by the sensors 11, 12, and 13 at the measurement cycle (t) with reference to the timing (time point) instructed to start the measurement, and notifies the main body device 5 (S4, S8, S10). Further, the time for acquiring the measurement result by the reference terminal device 2A for the synchronization setting is obtained by the main body device 5.

When the power supply of the terminal device 2B is turned on in the state where the measurement is repeated in this way, a connection is established with the network construction device 7 of the main body device 5 (S5, S6).
After that, at the timing of acquiring the measurement result by the reference terminal device 2A for synchronization setting, the terminal device 2B is instructed to start the measurement according to the measurement cycle (t) (S7). As a result, in the terminal device 2B, the measurement result is acquired in the measurement cycle (t) with reference to the time when the measurement start is instructed, which is the timing for acquiring the measurement result in the reference terminal device 2A for synchronization setting, and the main body device is used. 5 is notified (S9), whereby the measurement results can be acquired in synchronization with the terminal devices 2A and 2B.

[Synchronization shift]
By the way, in the case of instructing the start of measurement according to the measurement cycle at the timing of acquiring the measurement result by the reference terminal device 2A for synchronization setting in this way, the measurement is sufficiently synchronized with the terminal devices 2A and 2B. You can get the result.
However, in data communication in a network, a delay may occur in data communication due to retransmission, various failures, and the like. When such a delay occurs in the instruction to start measurement according to the measurement cycle and the delay becomes large, the timing of starting measurement in the terminal device 2B is delayed from the timing of starting measurement in the reference terminal device 2A by the amount of this delay. As a result, it becomes impossible to achieve sufficient synchronization.
Even when the data collection system 1 is continuously operated for a long period of time, the synchronization deviation gradually increases in the terminal devices 2A, 2B, and 2C, and an unacceptable synchronization deviation may occur depending on the system. The synchronization deviation is the deviation of the measurement time between the measurement results.

Therefore, the main body device 5 monitors the measurement time of the measurement result in the terminal devices 2A, 2B, and 2C, and is equal to or more than a predetermined value with respect to the measurement time by the reference terminal device for time monitoring in the plurality of terminal devices 2A, 2B, and 2C. When the measurement result that caused the synchronization deviation is acquired, at least the terminal device related to the measurement result that caused the synchronization deviation is notified of the measurement cycle at the timing of acquiring the measurement result by the reference terminal device for time monitoring. Then, the measurement start is instructed again.
As a result, for example, if the measurement start instruction sent for synchronization is delayed and a synchronization shift of a certain value or more occurs, the measurement start instruction is sent again to attempt synchronization, thereby causing a significant synchronization shift. To prevent.

Further, the reference terminal device for synchronization setting is applied to the reference terminal device for time monitoring, and a significant synchronization deviation is prevented by a simple process.

Specifically, the main body device 5 compares the measurement time added to the measurement result in the network construction device 7, and uses the measurement time in the reference terminal device for time monitoring as a reference, and another other with respect to the measurement time. The deviation amount of the measurement time of the terminal device is detected, and the synchronization deviation amount is detected by this. When the synchronization deviation amount is detected practically enough, the reception time of the measurement result may be used as the measurement time.

In this way, the synchronization deviation amount is detected, the synchronization deviation amount is determined, and when the synchronization deviation amount is equal to or more than a certain value, the terminal device related to this measurement result is used as a reference terminal device for time monitoring. The instruction to start measurement is sent again at the timing of acquiring the measurement result.

FIG. 3 is a time chart showing the processing of this synchronization shift in comparison with FIG.
In the example of FIG. 3, the power of the terminal device 2A is turned on first (S1), and the terminal device 2A is capable of data communication first (S2), whereby the terminal device 2A becomes a reference terminal for synchronization setting. It is set as a device and a reference terminal device for time monitoring, and the terminal device 2A is instructed to start measurement according to the measurement cycle (t) (S3), and acquisition and transmission of measurement results are repeated according to the measurement cycle (t) ( S4, S8, S9, S13, S15).
Further, when the power of the terminal device 2B is turned on (S5), a connection is established with the main body device 5, which enables data communication (S6). As a result, at the timing of acquiring the measurement result by the terminal device 2A, the main body device 5 instructs the start of measurement according to the measurement cycle (t) (S7). As a result, the terminal device 2B starts the measurement according to the measurement cycle (t) from the instruction to start the measurement (S10).
However, if this measurement start instruction is delayed, the measurement time will be delayed by the delay time (d) in the measurement start instruction even in the measurement results sequentially acquired by the terminal device 2B, and eventually the time will be monitored. A synchronization shift will occur by the amount of the delay time (d) with respect to the measurement result of the reference terminal device 2A for use.

In this data collection system 1, this synchronization deviation is detected from the measurement time added to the measurement result, the synchronization deviation amount (d) is determined by the determination reference value (S11), and the synchronization deviation amount is a predetermined value. If it is (for example, 10 seconds) or more, the network construction device 7 sends a measurement start instruction again at the timing of acquiring the measurement result by the time monitoring reference terminal device 2A (S12), whereby the terminal device 2B sends a measurement start instruction. After that, the measurement result is acquired by the measurement cycle (t) with reference to the instruction to start the measurement (S14). This prevents significant out-of-sync.

According to the above configuration, by notifying other terminal devices of the measurement cycle and instructing the start of measurement at the timing of acquiring the measurement result by the reference terminal device for synchronization setting, a plurality of terminal devices can be simply processed. It is possible to synchronize the acquisition of the measurement results in the above, and thereby it is possible to synchronize the acquisition of the measurement results with a plurality of terminal devices with a simpler configuration than in the conventional case.

Further, by setting the reference terminal device for the synchronization setting as the terminal device capable of data communication with the main body device first, for example, the terminal device for which the power is first turned on and data communication is possible is used for the synchronization setting. It can be set in the reference terminal device and synchronized in sequence, and synchronization can be achieved by a simpler process.

Further, when the measurement result in which the synchronization deviation of the predetermined value or more occurs is acquired, the measurement cycle is set to at least the terminal device in which the synchronization deviation occurs at the timing of acquiring the measurement result in the reference terminal device for time monitoring. By notifying and instructing the start of measurement again, when a terminal device in which the synchronization deviation becomes significant for some reason occurs, the timing of processing in this terminal device can be corrected and synchronization can be maintained.

Further, by using the reference terminal device for time monitoring as the reference terminal device for synchronization setting, the reference terminal device for synchronization setting can be used as the reference terminal device for time monitoring to maintain synchronization. ..

[Other Embodiments]
Although the specific configuration suitable for carrying out the present invention has been described in detail above, the present invention can be variously modified in the configuration of the above-described embodiment without departing from the spirit of the present invention.

That is, in the above-described embodiment, the case where the terminal device that is first turned on and capable of data communication is set as the reference terminal device for synchronization setting has been described, but the present invention is not limited to this, and for example, data collection. Various settings are required, such as when the terminal device that is the core of the system is set as the reference terminal device for synchronization setting, or when the terminal device that is infrequently stopped is set as the reference terminal device for synchronization setting. be able to.
Similarly, even in the reference terminal device for time monitoring, a terminal device other than the reference terminal device for synchronization setting may be applied.

1 Data collection system 2A, 2B, 2C terminal equipment 3A, 3B relay equipment 5 Main unit equipment 6 Monitoring equipment 7 Network construction equipment 8 Data monitoring equipment

Claims (7)

In a data collection system including a terminal device that acquires measurement results by a sensor and a main unit that communicates data with the terminal device by wireless communication and collects the measurement results acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
A data collection system that notifies another terminal device of the measurement cycle and instructs the start of measurement at the timing of acquiring the measurement result by the reference terminal device for synchronization setting. The data collection system according to claim 1, wherein the reference terminal device for synchronization setting is the terminal device that is the first of the plurality of terminal devices to be capable of data communication with the main body device. The main body device
The measurement time of the measurement result in the plurality of terminal devices is monitored, and the measurement time is monitored.
When the measurement result in which a synchronization deviation of a predetermined value or more occurs with respect to the measurement time by the reference terminal device for time monitoring in the plurality of terminal devices is acquired, the measurement result is obtained by the reference terminal device for time monitoring. The data collection system according to claim 1 or 2, wherein at least the terminal device related to the measurement result in which the synchronization shift has occurred is notified of the measurement cycle and the measurement start is instructed again at the timing of acquiring the data. The data collection system according to claim 3, wherein the reference terminal device for time monitoring is the reference terminal device for synchronization setting. In the main body device of a data collection system including a terminal device that acquires a measurement result by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement result acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
At the timing when the measurement result is acquired by the reference terminal device for synchronization setting, the main device of the data collection system notifies the other terminal device of the measurement cycle and instructs the start of measurement. In a control method of a data collection system including a terminal device that acquires a measurement result by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement result acquired by the terminal device.
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The control method is
In the main body device
After instructing the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle,
A control method of a data collection system that notifies another terminal device of the measurement cycle and instructs the start of measurement at a timing when the measurement result is acquired by the reference terminal device for synchronization setting. In a data collection system including a terminal device that acquires measurement results by a sensor and a main body device that communicates data with the terminal device by wireless communication and collects the measurement results acquired by the terminal device, the main body device is provided. In a control program of a data collection system that executes a predetermined processing procedure by execution by an arithmetic processing circuit
The terminal device is
In response to an instruction to start measurement by notification of the measurement cycle from the main body device, acquisition of the measurement result according to the measurement cycle is started and sent to the main body device.
The processing procedure is
In the main body device
A measurement cycle notification step for the reference terminal device that instructs the reference terminal device for synchronization setting in the plurality of terminal devices to start measurement according to the measurement cycle, and
Data collection including a measurement cycle notification step for another terminal device that notifies the other terminal device of the measurement cycle and instructs the start of measurement at the timing of acquiring the measurement result in the reference terminal device for synchronization setting. System control program.

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